package Lab02.test36;

/**
 * Created by Administrator on 2017/11/9.
 */
public class Postgraduate extends Student {
    @Override
    String calGrade(){
        //


        String grade = "";
        double avg =average();

        if(avg >=90 && avg <=100)
            grade ="优秀";
        else if(avg >=80 && avg <90)
            grade ="良好";
        else if(avg >=70 && avg <80)
            grade ="一般";
        else if(avg >=60 && avg <70)
            grade ="及格";
        else
            grade="不及格";

        return grade;
    }
}


